Control mechanism



Feb. 2, 1943. R. R. CAMPBELL 2,309,749

CONTROL MECHANISM I Filed May 9, 1941 Patented Feb. 2, 1943 UNEE STTES PATENT OFFICE CONTROL IVIECHANISM Rouel R. Campbell, Lynn, Mass, assignor to United Shoe Machinery Corporation, Flemington, N. 5., a corporation of New Jersey Application May 9, 1941, Serial No. 392,665

12 Claims. (01. 12-55) This application relates to machines embodying cooperating hammer and anvil members movable relative to one another to press the margin of a piece of sheet material positioned therebetween and movable as a unit intermittently to feed the material. More particularly, the application relates to mechanism for controlling the movement of the hammer toward and away from the anvil.

The mechanism illustrated is designed for 'use with an edge binding machine such as that illustrated in Letters Patent of the United States No. 2,224,139, granted December 10, 1940, upon an application filed in my name, or with a folding machine such as that illustrated in Letters Patent of the United States No. 2,147,749, granted February 21, 1939, upon an application of H. B. Miller, or with similar machinery employing a hammer and anvil movable as illustrated in the patents mentioned above. In the use of edge binding or folding machines such as those illustrated by the above-mentioned patents, it is desirable to be able to stop the motion of the hammer relative to the anvil with the hammer in an elevated position to facilitate presentation of a work piece to the machine. are commonly run at a high speed and include a drive shaft running at the rate of 1009 R. P. M. or more. In order to stop the machine with the hammer in an elevated position, provision has heretofore been made for arresting the rotation of the drive shaft and always stopping the shaft in the same angular position as by means of a mechanism such as is illustrated in Letters Patent of the United States No. 2,044,501, granted June i. Such machines 16, 1936, upon an application of P. R. Glass.

a day in waiting for the machine to come to rest if the machine is stopped and started frequently.

It is an object of this invention to reducethe time required to stop the motion of the hammer relative to the anvil. This object is attained, in

accordance with a feature of this invention, by

providing a connection between the drive shaft and the hammer which may be instantlybroken and the motion of the hammer relative to the anvil arrested immediately with the hammer in an elevated position. This connection is independent of the mechanism by which the drive shaft is connected with the hammer and anvil for oscillation of these members in unison to feed the work since it is unnecessary to stop the unitary oscillation of these members when presenting the work to the machine as long as the hammer remains above the anvil at all times.

This and other features of the invention will now be described in detail and illustrated in the accompanying drawing, in which Fig. lis a front elevation, partly in section, of an edge-binding machine in which the mechanism for stoppingv the motion of the hammer is embodied;

Fig. 2 is an enlarged view, partly in section, of the hammer-operating means;

Fig. 3 is a fragmentary section illustrating the connection between the hammer-operating rod and the driving means therefor; and

Fig. 4 is a rear elevation of the mechanism shown in Fig. 3.

The mechanism is illustrated herein as applied to an edge-binding machine of the type illustrated in Letters Patent of the United States No. 2,273,346, granted February 17, 1942, upon an application filed in my name, although it is to be understood that the mechanism is equally applicable to other machines, such as the folding machine of the Miller patent mentioned above, The edge-binding machine comprises a hammer l0 (Fig. 2) movable toward and away from an anvil l2 on which a work piece is supported, the hammer being movable toward and away from the anvil for pressing an adhesively coated binding strip against the margin of an insole supported on the anvil, the hammer and anvil being movable in unison intermittently to feed the work gripped between them. The anvil is mounted at the upper end of an arm [4 secured to a hollow shaft I6 arranged for oscillation in the base N3 of the machine. A drive shaft 20 (Fig. 1) is rotatab-ly mounted in the base of the machine and has secured to its outer end a pulley 22 connectedby a belt 24 to a suitable driving means. A cam (not shown) secured to the drive shaft 26 imparts oscillatory movement to a forked lever 26, the lower end of which is pivoted to an arm on a rock shaft 28 mounted in the base of the machine. Similarly secured to another arm on the rock shaft is a link 39, the upper end of which is connected to an arm 32 clamped to the inner end of the hollow shaft I6. By this arrangement, rotation of the drive shaft 20 causes oscillation of the hollow shaft Hi to which the anvil is secured to the end that the anvil is oscillated to feed a work piece held thereon by the hammer H).

The hammer i is mounted at the upper end of an arm 34 which is pivoted at 35 intermediate its ends to an intermediate portion of the arm 54 carrying the anvil [2, so that the hammer will swing in unison with the anvil and when the hammer is in pressing engagement with a' piece of work supported on the anvil, movement of these members in unison will impart a feeding movement to the work piece. On the return movement of the hammer and anvil, the hammer will be in an elevated position, as will be described, and the work piece at this time is held against retrograde movement by means of upper and lower presser feet 36 and 38, respectively, as pointed out in detail in said Patent No. 2,273,346.

The hammer-supporting arm 3 is bifurcated at its lower end and embraces a shaft or rod 6:3 mounted for reciprocation in the hollow shaft is and extending beyond the hollow shaft at each end thereof. The hammer-carrying arm 35 is urged to the position illustrated in Fig. 2 by a spring 42 surrounding the rod one end of the spring engaging a washer M fast on the rod M and held by the spring against the lower end of the arm 34, the opposite end of the spring being seated against a shoulder 16 in the hollow shaft 15. Accordingly, when the spring 12 is free to do so, it will move the arm 35 to elevate the hammer above the anvil, thereby facilitating presentation of a work piece to the machine. The motion of the rod 6!] to the right, as viewed in Fig. 2, to move the hammer toward the anvil is transmitted to the arm 35 through a spring 48, one end of which engages a washer 50 loose on the rod lil at the forward side of the. lower end of the arm 34, the other end of the spring being seated within a cup 52 secured to the rod by nuts 54, the cup being slidable within a sleeve 55 at the left end of the machine.

The mechanism for reciprocating the rod ii] and connecting it to the drive shaft 28 will now be described. The right or inner end of the rod 4!] projects from the adjacent end of the hollow shaft l5 and is threaded, as indicated in Figs. 2 and 3, to receive an internally threaded bushing 60 (Fig. 3), the outer end of which is provided with a hexagonal head 6! to facilitate assembly on the rod 48. The inner end of the bushing 63 engages a lock nut 02 threaded on the rod to limit and determine the position of the bushing relative to the rod. Mounted on the bushing between the lock nut 62 and the head (ii of the bushing is a sleeve 65 provided at its rearward end with upwardly extending ears t6 (Fig. 4). Pivoted between the ears on a pin 61 is a latch member 68, the forward end of which is urged downwardly toward the sleeve by a spring l'il coiled about the pin (ii, one end of the spring engaging the latch and the other end engaging a shoulder E2 (Fig. l) projecting laterally from the sleeve 64. The latch 63, when in the position of Fig. 1, forms a connection between the oscillating red to and a constantly reciprocating arm Hi, the upper end of which surrounds a pin '35 projecting from a block FE which is slidable on the sleeve 6 A shoulder 11 on the block 16 is arranged to engage the end of the latch 68, as indicated in Fig. 1, when the latch is urged downwardly by the spring it so that the latch and the block '56 will reciprocate in unison. Inasmuch as the latch 98 is pivoted to the sleeve 64 which is held by the bushing 60 against lengthwise movement relative to the rod 40, it will be obvious that when the latch is in its downward position the rod will be reciprocated by the arm 14 to move the hammer toward and away from the anvil. However, when the latch 63 is moved to the upper position shown in Figs. 2 and 3, the block 18 is free to reciprocate relative to the sleeve 60 and hence to the rod 40 which is then urged to the position shown in Fig. 2 by the spring 42, thus elevating the hammer and holding it in spaced relation above the anvil. A washer 30 carried by the rod it engages the portion of the arm 32 which is secured to the hollow shaft It, thus limiting the movement of the rod 69 to the left by the spring 32. In order to prevent rotation of the sleeve 64 carrying the latch member 88, relative to the bushing 69 and the rod 33, the sleeve has a pair of depending ears 32 which straddle an arm 8 integral with and extending rearwardly from the reciprocating block 75.

Movement of the latch 68 from the position of Fig. 1, in which the rod 4%] is connected to the driving arm 74, to the position shown in Figs. 2 and 3, in which the driving connection is broken and the hammer is moved into an elevated position, is efiected by upward movement of an arm 65 pivoted in the base of the machine at 88 and having a hooked portion 96 cooperating with a projection 92 on the latch 63 so that, upon upward movement of the arm 86 about its pivot, the latch is moved to the position indicated in Figs. 2 and 3. A treadle rod 94 connected at one end to the arm is connected at its other end to a treadle (not shown) to cause movement of the arm 26 to the position of Fig. 2, which position is determined by the engagement of a stop pin 96 with the portion 98 of the arm 85. The upward movement of the arm 86 also causes upward movement of the upper presser foot 35 by engaging and, moving a bell crank lever Hit) in a counter-clockwise direction, the other end of this lever being connected to a lever IE2 which is in turn connected to a rod 104, rearward movement of which causes upward movement of the presser foot, as described more fully in said Patent No. 2,273,346. It will thus be seen that, after the motion of the hammerrelative to the anvil has been arrested, the engagement of the arm 85 with the lever will cause the upper presscr foot to be elevated, thus freeing the work piece or permitting presentation of a new work piece to the machine. Conversely, the upper presser foot will be lowered or moved into engagement with the work during the first part of the downward movement of the arm 86 toward the position shown in Fig. 1 to grip and hold the work in place, after which the hammer-operating rod 4!] will be coupled to the arm 74 to reciprocate the hammer toward and away from the anvil. The work slips through the presser feet 38, 38 during the feeding movements of the hammer and anvil but is held by the presser feet during the return movements of these members.

The arm 14 is driven from the drive shaft 20, which carries a cam I66 (Fig. 1) which transmits vibratory movement to a forked lever 08 and thence through a link I I0 and an arm I [2 to the arm 14. The arms I I2 and 14 are journaled on a common pivot rod I I4 and are yieldably held in the relation shown in Figs. 1 and 2 by a spring pressed plunger I 16 carried by the arm 14 and by a stop screw I 13 carried by the arm I I2. By this arrangement, the blow of the hammer is softened while the spring 43 heretofore described compensates for thickness in the stock, the spring 48 being lighter than the spring acting on the plunger 6.

In the operation of the machine, a strip of binding tape is folded around the edge of an insole held between the presser feet 36 and 38, as described in the said Patent 2,273,346, and when the parts are positioned as shown in Fig. 1 and the drive shaft 21] is rotating, the hammer will move toward the anvil to press the binding strip against the insole; and while it is in pressing engagement with the insole, the hammer and anvil will move as a unit through the oscillation of the hollow shaft ['5 to impart a feeding movement to the work. The hammer is then moved away from the insole and the hammer and anvil are then moved as a unit back to their starting positions before the next pressing movement of the hammer. Upon raising the treadle rod 94 and thus lifting the arm 86, the latch 58 is moved upwardly out of engagement with-the shoulder 11 of the block on the driving arm M, thus uncoupling the rod 41! from the driving arm and permitting upward movement of the hammer by the spring 42 to the position shown in Fig. 2. This movement takes place immediately upon depressing the treadle so that no time is lost in waiting for any driven members to slow down and the hammer may be substantially immediately recoup-led to the driving arm M by permitting downward movement of th latch 63. Inasmuch as the arm id is reciprocated very rapidly, the coupling of the parts will be almost instantaneous even if the arm is in the position shown in Fig. 2 at the time the latch is released as this arm will move to the position of Fig. 1 immediately thereafter and will be coupled by the latch 68 to the hammer operating rod 40. Thus, there is practically no time lost in elevating the hammer to permit presentation of a new work piece to the machine. This arrangement also obviates the necessity of using a clutch of the type shown in the Glass patent mentioned above or its equivalent in a machine of the type illustrated or with a folding machine such as that shown in the Miller patent.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a machine of the character described, a hammer, an anvil, a drive shaft, and manually controlled movable means within the machine for optionally connecting the hammer directly to said drive shaft to oscillate the hammer toward and away from the anvil.

2. In a machine of the character described, a hammer, an anvil, a drive shaft, manually controlled means for optionally connecting the hammer to said drive shaft for oscillation to and from the anvil, and means for holding the disconnected hammer in a predetermined position spaced from the anvil.

3. In a machine of the character described, a hammer, an anvil, a drive shaft, means connecting said hammer and anvil to said drive shaft for unitary movement to feed a work piece positioned on the anvil, means for coupling said hammer to said drive shaft for oscillating movement to and from the anvil in timed relation to the feeding movements thereof, and means for rendering said coupling means inoperative whereby the motion of the hammer toward and away from the anvil may be arrested.

4. In a machine of the character described, a hammer, an anvil, a drive shaft, means connecting said hammer and anvil to said drive shaft for unitary movement to feed a work piece positioned on the anvil, means for coupling said hammer to said drive shaftfor oscillating movement to and from the anvil in timed relation to the feeding movements thereof, means for rendering said coupling means inoperative whereby the motion of the hammer toward and away from the anvil may be arrested, and means operative when said coupling means is rendered inoperative for moving said hammer to a predetermined position in spaced relationship with said anvil.

5. In a machine of the character described, a hammer, an anvil, a reciprocatory rod connected to said hammer for moving said hammer toward and away from said anvil, a drive member reciprocable on said rod, a latch for coupling said drive member to said rod, and means for moving said latch into and out of coupling engagement, whereby the motion of said hammer relative to said anvil may be started or stopped at will.

6. In a machine of the character described, a hammer, an anvil, a reciprocatory rod connected to said hammer for moving said hammer toward and away from said anvil, a drive member reciprocable on said rod, a latch for coupling said drive member to said rod, means for moving said latch into and out of coupling engagement whereby the motion of said hammer relative to said anvil may be started or stopped at will, and a spring for moving the hammer awayfrom the anvil upon movement of the latch out of coupling engagement.

7. In a machine of the character described, a hammer, an anvil, a reciprocatory rod connected to said hammer for moving said hammer toward and away from said anvil, a drive member reciprocable on said rod, a latch carried by said rod, means for moving said latch into and out of engagement with said drive member whereby the motion of said hammer relative to said anvil may be started or stopped at will, a spring acting on said rod for moving the hammer away from the anvil upon movement of the latch out of engagement with said drive member, and means for limiting the movement of said rod by said spring to limit the movement of the hammer away from the anvil upon disengagement of said latch with said drive member.

8. In a machine of the character described, a hammer, an anvil, an cscillatable sleeve connected to said hammer and anvil to impart unitary oscillation thereto, a rod reciprocable within said sleeve and connected to said hammer for causing movement of said hammer toward and away from said anvil upon reciprocation of said rod, a drive shaft, means connecting said drive shaft to said sleeve to oscillate the sleeve, a drive member reciprocable on said rod, means connecting said drive member to said drive shaft, a latch connected to said rod, and means moving said latch into and out of engagement with said drive member for causing reciprocation ofthe hammeroperating rod when said latch is in engagement with the drive member.

9.. In a machine of the character described, a hammer, an anvil, an oscillatable sleeve connected to said hammer and anvil to impart unitary oscillation thereto, a rod reciprocable within said sleeve and connected to said hammer to move it toward and away from said anvil upon reciprocation of said rod, a drive shaft, means connecting said shaft to said sleeve to oscillate the sleeve, a drive member reciprocable on said rod, means connecting said drive member to said drive shaft, a latch connected to said rod, means moving said.

latch into and out of engagement with said drive member for causing reciprocation of the hammer-operating rod when said latch is in engagement with the drive member, and aspring acting on said rod and biasing the rod in a direction to move the hammer away from the anvil.

10. In a machine of the character described, a hammer, an anvil, an oscillatable sleeve connected to said hammer and anvil to impart unitary oscillation thereto, a rod reciprocable within said sleeve and connected to said hamme'ri'for causing movement of said hammer toward and away from said anvil upon reciprocation'of'said rod, a drive shaft, means connecting saidshaft to said sleeve to oscillate the sleeve, a drive member reciprocable on said rod, means connecting saidvdrive member to said drive shaft,.a1atch connected to said rod, means moving saidlatch into and out of engagement with said drive member for causing reciprocation of the'hammeroperating rod when said latch is in engagement with the drive member, a spring; acting on said rod and biasing the rod in a directionxto move the hammer away from the anvil, and means limiting the movement of the rod under the force exerted by said spring.

11. In a taping machine, a hammer, ananvil,

margin of a work piece supported on said anvil,

means for intermittently moving said hammer and anvil in unison to feed the work piece, a presser foot arranged for engagement with the lower surface of the work piece, a second presser foot arranged to engage the upper surface of the work piece to hold the work piece against the lower presser foot, means for raising the upper presser foot to facilitate presentation of a work piece to the machine, and means operative upon raising said presser foot for immediately arresting the motion of the hammer relative to said anvil.

12. In a taping machine, a hammer, an anvil, means for moving said hammer toward and away from said anvil to apply a piece of tape to the margin of a work piece supported on said anvil,

means for intermittently moving said hammer and anvil in unison to feed the Work piece, a presser foot arranged for engagement with the lower surface of the work piece, a second presser foot arranged to engage the upper surface of the work piece to hold the work piece against the lower presser foot, means for raising the upper presser foot to facilitate presentation of a work piece to the machine, and means for concomitantly arresting the motion of the hammer relativeto the anvil and causing the hammer to come to rest in a predetermined position spaced above the anvil.

* ROUEL R. CAMPBELL. 

